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Answers posted by meena.p

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answered Nov 8, 2018
Solution : $_{16}S=1s^2,2s^2,2p^63s^2,3p^4$for $1s^2,n+1=1+0=1$for $2p^6,n+1=2+0=2$for $3s^2,n+1=3+0...
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answered Nov 8, 2018
Solution : $R= 45 \Omega$$\therefore G= s$$K_{cell}=\large\frac{1}{n}$$\qquad= \large\frac{22\;cm}{3...
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answered Nov 1, 2018
Solution : $\qquad \qquad N_2O_4 \qquad \to \qquad 2 NO_2$Begining : a moles $\qquad \qquad$ 0 moles...
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answered Nov 1, 2018
Solution : A lewis base is a species which can donate one or more electron pairs. $NH_3$ acts as lew...
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answered Nov 1, 2018
Solution : In water Na2O" role="presentation" style="position: relative;">Na2ONa2ONa_2O dissociat...
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answered Nov 1, 2018
Solution : Using the chemical reaction given above, we can rewrite the Equilibrium constant expressi...
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answered Oct 31, 2018
please check the question
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answered Oct 31, 2018
Solution: Equal amounts of reactants are poured into a suitable container. Given sufficient time, th...
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answered Oct 31, 2018
Solution : If we increase pressure, equilibrium. will shift in the direction of less volume, hence ...
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answered Oct 31, 2018
Solution : A solution of a strong acid, such as hydrochloric acid, at concentration $1\; mol\; dm^{−
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answered Oct 30, 2018
Solution :All alkaline metal chlorides $(MCl_2)$ on hydrolysis will produce acidic solution$MCl_2+H_...
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answered Oct 29, 2018
Solution : $p^{H}=7+\large\frac{1}{2}$$(4.8-4.8)=7.0$
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answered Oct 29, 2018
Solution : $[H^{+}]$ ions concentrations are $10^{-11},10^{-12}$ and $10^{-13}$ on mixing equal volu...
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answered Oct 29, 2018
Solution : 0.1 MHCl means $[H^+]=10^{n} \; \therefore P^n =1$0.1 MKOH means $[OH^+]=10^{+} \; \there...
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answered Oct 26, 2018
Solution : $P^{OH} =-\log (1.25 \times 10^{-4})$$\qquad= -0.0969 -4.0=3.9031$$p^{H} =14-3.9031 =10.0...
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answered Oct 26, 2018
Solution : $AglO \equiv Ag^{+}+IO^{-}$$K_{sp}=S^{2}$$\therefore S= (K_{sp})^{1/2}$$\qquad= 1 \times ...
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answered Oct 26, 2018
Solution : $HCOONa$ is a salt of weak acid $(HCOOH)$ and strong base $(NaOH)$ .So it basic $C_4H_5 N...
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answered Oct 26, 2018
Solution : All alkaline metal chlorides $(MCl_2)$ on hydrolysis will produce acidic solution $MCl_2+...
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answered Oct 26, 2018
Solution : $P^H= 3 means [H^+]=10^{-3}M$100 ml juice contanis $10^{-3}\;mole \;H^{+}$ ions$\qquad= 1...
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answered Oct 26, 2018
Solution : $P^{H} =+\large\frac{1}{2}$$(P^kW+P^{k}a+\log C)$$\qquad= \large\frac{1}{2} $$\times 14 +...
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answered Oct 26, 2018
Solution : $K_{b}=\large\frac{K_{w}}{K_{b}}$$\quad= \large\frac{1.0 \times 10^{-34}}{1.7 \times 10^{...
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answered Oct 25, 2018
Solution : Because there already is a concentration of $(OH)^{-}$ ions from the NaOH in solution , t...
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answered Oct 25, 2018
Solution : Only the changing of the temperature of the equilibrium reaction will change the K of the...
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answered Oct 25, 2018
Solution : Bcause the pH is defined as the negative of the log of the $H^+$ concentration, it is $-(...
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answered Oct 25, 2018
Solution :100g of silicon dioxide contains 46.7 g of silicon, or 100 – 46.7 ( i.e. 53.3 g) of oxygen
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answered Oct 25, 2018
Solution: In the reaction for the formation of ammonia $N_2+3H_2 \to 2H_3$
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answered Oct 25, 2018
Solution :the concentration of the un-ionized molecules must be relatively large compared with the i...
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answered Oct 25, 2018
Solution : $pH+pOH=14$ In this problem , the $pOH=-\log [OH]= -\log [10^{-4}]=(-4)=4$Placing this va...
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answered Oct 24, 2018
Solution: The concentrations in an expression of the equilibrium constant are given in moles/liter (...
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answered Oct 24, 2018
Solution : The correct setup of $K_{eq}$ is the product of the concentration of the products over th...
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answered Oct 23, 2018
Solution : $\sqrt{48}=4 \sqrt{3}$$H_2(g)+I_2(g) \to 2HI(g) $ at $720^{\circ} K$[HI] means the concen...
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answered Oct 23, 2018
Solution : $\large\frac{P_0 -P_1}{P_0}=\frac{760-736.2}{760}$$\qquad= 0.03132$$\qquad= \large\frac{m...
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answered Oct 16, 2018
Solution : Photosynthesis is an Endothermic Reaction as heat is absorbed.
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answered Oct 16, 2018
Solution : A reaction for which heat must be removed from the system to maintain isothermal conditio...
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answered Oct 16, 2018
Solution : The Conservation of Energy states that the energy of a system plus surrounding can neithe...
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answered Oct 16, 2018
Solution : If we double the kg amount of reactant, we double the moles. The extent becomes double.
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answered Oct 16, 2018
Solution : Extent of the reaction is = (5-1) / (1) = 4.
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answered Oct 16, 2018
Solution : It denotes that how much a reaction occurs.
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answered Oct 16, 2018
Solution : Kelvin is a unit, not dimension.
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answered Oct 16, 2018
Solution : Zero after the point counts.
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answered Oct 16, 2018
Solution : Number of digits that are reasonably sure, called significant figures.
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answered Oct 16, 2018
Solution : The law of conservation of mass states that mass in an isolated system is neither created...
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answered Oct 16, 2018
Solution : A balanced chemical equation occurs when the number of the different atoms of elements in...
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answered Oct 16, 2018
Solution : According to the Law of Conservation of Mass, mass cannot be created or destroyed.Therefo...
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answered Oct 16, 2018
Solution : $\% \;Al$ = (Atomic mass of Al / Formula mass of $Al_2O_3) \times 100$$\%\; Al = (54\; am...
0 votes
answered Oct 16, 2018
Solution : 100g of silicon dioxide contains 46.7 g of silicon, or 100 – 46.7 ( i.e. 53.3 g) of ox
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